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Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 12

Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German. Mean line confidence on this page: 0.93.

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The machine reads it as

  1. In the erro Rest Columnsarc expressed the obliquities
  2. ot the incident and emergent rays to the plate ot the
  3. Air, that is, their ansles of incidence and retraction. In
  4. the third Column the Diameter ot any coloured Rine
  5. at thole obliquities is expresed in parts, ot irtrich ten
  6. conscitute that Diameter irhen the rurs arc perpendicu-
  7. lar. And in the Tourth Column the thickness ot the AIr
  8. at the circumterence ot that Rins is expressed in parts
  9. OE wrhich al(o ten constiture that thicknels irhren the rayS
  10. are perpendicular.
  11. And From these meatures I Ecem to sather this Rule:
  12. That thethickness oF the Air is proportional tothe sc-
  13. Cant OF an ansle, wrhole Sine is a certain mean prOPOT-
  14. tional betreen the Sines ot incidence and retraction.
  15. And that mean proportional, (0 tar a5 by thele meatures
  16. lcan decermine iE, IS the tirst ot an hundred and six
  17. arichmetical inean proportionals betreen thole Sines
  18. counted fiom the sine ot retraction irtren the retra
  19. ction is made out of the Cla(s into the plate oF RIT, Or
  20. From the Sine ot incidence wrten the retraction is
  21. made out ot the plate ot Air into the Cila(5.
  22. OBS. VIII.
  23. The dark Spot in the middle of the Rinos inerealed
  24. also by the obliquation of the Lye, althoush almost in-
  25. Censibly. But it instead ofthe Object-Cilaces the Prisms
  26. evere made use otq its increase as more manifest irhen
  27. viemed (0 obliquely that no Colours appeared about it.
  28. Itras least irhen the rays rere incident most obliquely
  29. on the interjacent Air, and as the obliguier decrealed
  30. it increaled more and more until the coloured RingS ap-
  31. Dearec,

Cite

Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light, fol. 12. Machine transcription, not an edition: Leibniz Legible (model FoNDUE-GD_v2_ft_Leibniz, run 74). https://leibnizlegible.com/page/1677894601:0184?run=74